1) shaft current
轴电流
1.
This paper analyzes the cause of shaft current occurred in large and medium capacity motors with rolling bearings and consequential damage to the bearings.
文章介绍了采用滚动轴承的大中型电动机轴电流产生的原因及其对电动机轴瓦造成的损害,并结合实践经验介绍了轴电流烧伤轴瓦的特征及处理方法。
2.
Based on the case analysis of the faiture of AC motor shaft current of the third phas feed pump of Shanxi Company of China Aluminium, damages of shaft current generated in large and medium scaled AC motors are analysed and measures against fire are put forward as well.
以中国铝业山西分公司热电分厂三期给水泵电机轴发生的损伤故障分析为例 ,分析了大中型交流电动机轴电流的产生和危害 ,提出了针对此类故障的防范措施。
3.
After thorough studies about the various causes as well as its performance theoretically and accompanied by the field test, the shaft current on generator has been well analyzed in Guangxi Yantan hydraulic power plant.
详细分析了轴电流的各种成因及其特点 ,通过现场测试 ,对广西岩滩电厂水轮发电机组的轴电流进行了深入的分析研究。
2) bearing current
轴电流
1.
This paper discussed that high-frequence pulses in variable-frequence power increased bearing current of high-power motor,analyzed the appearance of high-frequency bearing current,introduced the method to judge burnt bearing due to bearing current.
阐述了变频电源中的高频谐波增大了大中型电机的轴电流,分析了高频轴电流的产生机理,提供了轴电流烧损轴承的判断方法。
2.
To decrease the harm caused by bearing current, some measures, such as mounting the power filter and insulating the front and rear bearings are presented, in addition that the magnetic circuit is required to be balance in manuf.
为减少轴电流的危害 ,除电机制造需满足磁路平衡外 ,提出加装电源滤波器 ,前后轴承都要绝缘处理等防止变频电动机轴电流危害的措
3) shaft-current
轴电流
1.
The origin of shaft-current and its damage to generator units are introduced briefly,and prevention measures are proposed.
简要介绍了轴电流形成的原理和对机组产生的危害,提出了防范措施,并结合琅琊山抽水蓄能电站机组各部轴承的结构特点,分析了其轴电流保护装置原理,以及产生轴电流的几种可能情况,为查找故障点指明了方向。
2.
In this paper,the causes of shaft-voltage and shaft-current are briefly introduced,as well as its damage to the generator units.
介绍轴电压、轴电流产生的原因及对机组带来的危害,提出防范办法。
4) axial current
轴电流
1.
Inverter-driven increases motor s invalidation probability and axial current.
变频驱动增加了电机的失效率和轴电流。
5) bearing current
轴承电流
1.
The optimal protection for bearing current was reached by the insulation of both ends of bearing and grounding of carbon brush of motor shaft.
电机双端轴承绝缘并且电机轴碳刷接地,可构成对轴承电流的最佳防护。
2.
This paper investigates the mechanism and form of the common-mode voltage,shaft voltage and bearing current in different kinds of PWM control methods,and sets up a common-mode equivalent circuit for PWM inverter drive system.
研究了不同PWM控制方式下电机共模电压、轴电压和轴承电流的产生机理,建立了脉宽调制逆变器驱动系统共模回路的等效电路,并由此得到轴电压的计算公式。
6) d-axis current
d轴电流
1.
A optimized algorithm for stator flux oriented control with direct solution of d-axis current is proposed by detail analysis of induction motor flux oriented control,and the dynamic mathematical model of induction motor drives is simplified,the simplified analytic expression of d-axis current is presented,d-axis current can be solved directly by this analytic expression in the flux linkage ch.
在对异步电动机定子磁场定向控制进行了较深入的分析后,提出了一种基于解析计算的定子磁场定向控制的改进方法,给出了计算d轴电流分量的解析计算式。
补充资料：水轮发电机轴电流
水轮发电机轴电流
shaft's current of hydro-generator
shUI}un fadlonll zhoud{anl旧水轮发电机轴电流(shaft‘5 eurrent of hy-drogenerator)流过发电机轴颈与轴瓦之间的电流。发电机在运行过程中，磁场回路的不均衡性，在发电机轴和轴瓦回路产生轴电压，从而出现轴电流。水轮发电机轴电压的数值较小，仅有几伏。但是一旦轴瓦支撑对地绝缘受到破坏，轴与轴瓦之间，就形成较大的电流回路，产生电火花，使轴表面与轴瓦烧损。中国丰满水电站在20世纪50年代曾发生过此类事故。为了防止轴表面与轴瓦免受轴电流烧损，在推力轴承底座加上绝缘垫，或在轴瓦背面加上绝缘，以及所有与轴瓦有关连的温度计都予以绝缘处理，使在这些回路中形成较高的绝缘电阻，就能限制轴电流使其不危害设备.中国的水轮发电机轴绝缘电阻在运行中一般规定最低为0.3 Mn。国外，有的还在加强绝缘基础上，装设轴电流保护装置，一旦电流增大，就发出信号使机组停机。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条